A multi-level optimization control method for the whole process of polyester fiber production

Abstract

The invention relates to a multistage optimization control method for the whole polyester fiber production and manufacturing process. After a set value of a process parameter Da of a target product isdetermined according to a performance index of the target product, production is performed based on the process parameter Da set based on the set value; during the production process, a real value ofthe process parameter Da of the target product in real time and the set value is adjusted by using the real value, wherein error compensation is carried out on a set value of a process parameter j when an absolute error of the real value of the certain process parameter j in the process parameter Da and the set value accounts for more than 5 percent of the set value and the set value after errorcompensation is used for replacing an original set value in set value adjustment; and otherwise, no error compensation is carried out. According to the method provided by the invention, fast responseto the fiber production and manufacturing is realized; e energy conservation and consumption reduction can be realized within the short time on the premise that the enterprises demand diversificationand competitive differentiation; different polyester fiber products with low cost and high quality can be produced; and the economic benefits and market competitiveness of the enterprises can be promoted.

Description

technical field [0001] The invention belongs to the technical field of chemical fiber production technology, and relates to a multi-level optimization control method for the whole process of polyester fiber production. Background technique [0002] Chemical fiber manufacturing is an important basic material in my country, and it is also an important pillar industry for improving the overall competitiveness of the textile industry. In 2014, the output of chemical fiber reached 43.9 million tons, accounting for more than 85% of my country's total fiber processing, accounting for more than 50% of the world, of which large-capacity polyester and polyamide accounted for more than 80% of chemical fiber, single-line production capacity is getting higher and higher, but Due to the serious homogeneity of technology and products, the differentiation rate of chemical fiber products is insufficient, and the production capacity of general-purpose products is overcapacitated. Therefore, it...

AI Technical Summary

Problems solved by technology

In 2014, the output of chemical fiber reached 43.9 million tons, accounting for more than 85% of my country's total fiber processing, accounting for more than 50% of the world, of which large-capacity polyester and polyamide accounted for more than 80% of chemical fiber, single-line production capacity is getting higher and higher, but Due to the serious homogeneity of technology and products, the differentiation rate of chemical fiber products is insufficient, and the production capacity of general-purpose products is overcapacitated. Therefore, it is urgent to achieve flexible processing on high-capacity and continuous equipment, and to develop small-batch and multi-variety products. Technology

The advantage of the above two methods is to use the genetic algorithm and combine it with the actual problem, use the empirical knowledge of the actual problem, simplify the complexity of the problem, narrow the scope of the solution, so that a better solution can be obtained more quickly, but its The disadvantage is that the constraints of the solution are relaxed, the optimality of the solution is reduced, and it is difficult to judge the effectiveness of the solution due to the lack of methods to evaluate the quality of the solution, so it is easy to lead to low production efficiency, high production costs and affect fiber production when guiding production. quality

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